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INSTALL_TINY revision 1.37.2.2
      1 #	$NetBSD: INSTALL_TINY,v 1.37.2.2 2002/01/10 19:44:29 thorpej Exp $
      2 #
      3 #	INSTALL_TINY - Tiny Installation kernel, suitable for 4M machines.
      4 #
      5 #	This kernel should be derived from INSTALL (which is derived
      6 #	from GENERIC) with some features commented out.
      7 #
      8 #	This kernel has been optimized for space. It is targeted towards
      9 #	small memory machines (4M). It has no SCSI, PCI or EISA. It does
     10 #	have pcmcia, for old laptops.
     11 #
     12 
     13 include "arch/i386/conf/std.i386"
     14 
     15 makeoptions	COPTS="-Os"		# Optimise for space. Implies -O2
     16 
     17 # Enable the hooks used for initializing the root memory-disk.
     18 options 	MEMORY_DISK_HOOKS
     19 options 	MEMORY_DISK_IS_ROOT	# force root on memory disk
     20 options 	MEMORY_DISK_SERVER=0	# no userspace memory disk support
     21 options 	MINIROOTSIZE=2880	# 1.44M, same as a floppy
     22 
     23 maxusers	2		# estimated number of users
     24 
     25 # CPU support.  At least one is REQUIRED.
     26 options 	I386_CPU
     27 options 	I486_CPU
     28 #options 	I586_CPU
     29 #options 	I686_CPU
     30 
     31 # CPU-related options.
     32 options 	MATH_EMULATE	# floating point emulation
     33 #options 	VM86		# virtual 8086 emulation
     34 #options 	USER_LDT	# user-settable LDT; used by WINE
     35 # eliminate delay no-ops in I/O; recommended on all but very old machines
     36 #options 	DUMMY_NOPS
     37 
     38 # Misc. i386-specific options
     39 #options 	XSERVER		# X server support in console drivers
     40 
     41 # This option allows you to force a serial console at the specified
     42 # I/O address.
     43 #options 	CONSDEVNAME="\"com\"",CONADDR=0x3f8,CONSPEED=9600
     44 
     45 # The following options override the memory sizes passed in from the boot
     46 # block.  Use them *only* if the boot block is unable to determine the correct
     47 # values.  Note that the BIOS may *correctly* report less than 640k of base
     48 # memory if the extended BIOS data area is located at the top of base memory
     49 # (as is the case on most recent systems).
     50 #options 	REALBASEMEM=...	# size of base memory
     51 #options 	REALEXTMEM=...	# size of extended memory
     52 
     53 #options 	UCONSOLE	# users can use TIOCCONS (for xconsole)
     54 options 	INSECURE	# disable kernel security levels
     55 
     56 options 	RTC_OFFSET=0	# hardware clock is this many mins. west of GMT
     57 #options 	NTP		# NTP phase/frequency locked loop
     58 
     59 #options 	KTRACE		# system call tracing via ktrace(1)
     60 
     61 #options 	SYSVSEM		# System V-like semaphores
     62 #options 	SYSVSHM		# System V-like memory sharing
     63 #options 	SHMMAXPGS=1024	# 1024 pages is the default
     64 
     65 #options 	LKM		# loadable kernel modules
     66 
     67 # Diagnostic/debugging support options
     68 #options 	DIAGNOSTIC	# expensive kernel consistency checks
     69 #options 	DEBUG		# expensive debugging checks/support
     70 #options 	KMEMSTATS	# kernel memory statistics (vmstat -m)
     71 #options 	DDB		# in-kernel debugger
     72 #options 	DDB_HISTORY_SIZE=512	# enable history editing in DDB
     73 #options 	KGDB		# remote debugger
     74 #options 	KGDB_DEVNAME="\"com\"",KGDB_DEVADDR=0x3f8,KGDB_DEVRATE=9600
     75 #makeoptions	DEBUG="-g"	# compile full symbol table
     76 
     77 # Compatibility options
     78 #options 	COMPAT_NOMID	# compatibility with 386BSD, BSDI, NetBSD 0.8,
     79 #options 	COMPAT_09	# NetBSD 0.9,
     80 #options 	COMPAT_10	# NetBSD 1.0,
     81 #options 	COMPAT_11	# NetBSD 1.1,
     82 #options 	COMPAT_12	# NetBSD 1.2,
     83 #options 	COMPAT_13	# NetBSD 1.3,
     84 #options 	COMPAT_14	# NetBSD 1.4,
     85 #options 	COMPAT_43	# and 4.3BSD
     86 options 	COMPAT_386BSD_MBRPART # recognize old partition ID
     87 #options 	TCP_COMPAT_42	# 4.2BSD TCP/IP bug compat. Not recommended.
     88 
     89 #options 	COMPAT_SVR4	# binary compatibility with SVR4
     90 #options 	COMPAT_IBCS2	# binary compatibility with SCO and ISC
     91 #options 	COMPAT_LINUX	# binary compatibility with Linux
     92 #options 	COMPAT_FREEBSD	# binary compatibility with FreeBSD
     93 
     94 # File systems
     95 file-system 	FFS		# UFS
     96 #file-system 	EXT2FS		# second extended file system (linux)
     97 #file-system 	LFS		# log-structured file system
     98 #file-system 	MFS		# memory file system
     99 file-system 	NFS		# Network File System client
    100 file-system 	CD9660		# ISO 9660 + Rock Ridge file system
    101 file-system 	MSDOSFS		# MS-DOS file system
    102 #file-system 	FDESC		# /dev/fd
    103 file-system 	KERNFS		# /kern
    104 #file-system 	NULLFS		# loopback file system
    105 #file-system 	PORTAL		# portal filesystem (still experimental)
    106 #file-system 	PROCFS		# /proc
    107 #file-system 	UMAPFS		# NULLFS + uid and gid remapping
    108 #file-system 	UNION		# union file system
    109 
    110 # Filesystem options
    111 #options 	QUOTA		# UFS quotas
    112 #options 	NFSSERVER	# Network File System server
    113 options 	NFS_V2_ONLY	# Exclude NFS3 and NQNFS code to save space
    114 options 	VNODE_OP_NOINLINE # Save space by not inlining vnode op calls
    115 #options 	EXT2FS_SYSTEM_FLAGS # makes ext2fs file flags (append and
    116 				# immutable) behave as system flags.
    117 
    118 # Networking options
    119 #options 	GATEWAY		# packet forwarding
    120 options 	INET		# IP + ICMP + TCP + UDP
    121 #options 	MROUTING	# IP multicast routing
    122 #options 	NS		# XNS
    123 #options 	NSIP		# XNS tunneling over IP
    124 #options 	ISO,TPIP	# OSI
    125 #options 	EON		# OSI tunneling over IP
    126 #options 	CCITT,LLC,HDLC	# X.25
    127 #options 	NETATALK	# AppleTalk networking protocols
    128 #options 	PPP_BSDCOMP	# BSD-Compress compression support for PPP
    129 #options 	PPP_DEFLATE	# Deflate compression support for PPP
    130 #options 	PPP_FILTER	# Active filter support for PPP (requires bpf)
    131 #options 	PFIL_HOOKS	# pfil(9) packet filter hooks
    132 #options 	TCP_DEBUG	# Record last TCP_NDEBUG packets with SO_DEBUG
    133 
    134 # These options enable verbose messages for several subsystems.
    135 # Warning, these may compile large string tables into the kernel!
    136 #options 	EISAVERBOSE	# verbose EISA device autoconfig messages
    137 #options 	PCIVERBOSE	# verbose PCI device autoconfig messages
    138 #options 	PCI_CONFIG_DUMP	# verbosely dump PCI config space
    139 #options 	PCMCIAVERBOSE	# verbose PCMCIA configuration messages
    140 #options 	SCSIVERBOSE	# human readable SCSI error messages
    141 #options 	I2OVERBOSE	# verbose I2O driver messages
    142 
    143 # Squeeze...
    144 options 	NVNODE=50
    145 options 	NBUF=20
    146 options 	BUFPAGES=20
    147 options 	NMBCLUSTERS=64
    148 
    149 # Kernel root file system and dump configuration.
    150 config		netbsd	root on ? type ?
    151 #config		netbsd	root on sd0a type ffs
    152 #config		netbsd	root on ? type nfs
    153 
    154 #
    155 # Device configuration
    156 #
    157 
    158 mainbus0 at root
    159 
    160 #apm0	at mainbus0			# Advanced power management
    161 
    162 
    163 # Basic Bus Support
    164 
    165 # PCI bus support
    166 #pci*	at mainbus? bus ?
    167 #pci*	at pchb? bus ?
    168 #pci*	at ppb? bus ?
    169 
    170 # PCI bridges
    171 #pchb*	at pci? dev ? function ?	# PCI-Host bridges
    172 #pceb*	at pci? dev ? function ?	# PCI-EISA bridges
    173 #pcib*	at pci? dev ? function ?	# PCI-ISA bridges
    174 #ppb*	at pci? dev ? function ?	# PCI-PCI bridges
    175 # XXX 'puc's aren't really bridges, but there's no better place for them here
    176 #puc*	at pci? dev ? function ?	# PCI "universal" comm. cards
    177 
    178 # As well as 5 and 7, avoid irq 4 and 3 because we do not probe com* here
    179 options 	PCIC_ISA_INTR_ALLOC_MASK=0xff47
    180 
    181 # PCMCIA bus support
    182 pcmcia* at pcic? controller ? socket ?
    183 #pcmcia* at tcic? controller ? socket ?
    184 
    185 # ISA PCMCIA controllers
    186 pcic0	at isa? port 0x3e0 iomem 0xd0000 iosiz 0x10000
    187 pcic1	at isa? port 0x3e2 iomem 0xe0000 iosiz 0x4000
    188 
    189 # EISA bus support
    190 #eisa0	at mainbus?
    191 #eisa0	at pceb?
    192 
    193 # ISA bus support
    194 isa0	at mainbus?
    195 #isa0	at pceb?
    196 #isa0	at pcib?
    197 
    198 # ISA Plug-and-Play bus support
    199 #isapnp0	at isa?
    200 
    201 # Coprocessor Support
    202 
    203 # Math Coprocessor support
    204 npx0	at isa? port 0xf0 irq 13	# x86 math coprocessor
    205 
    206 
    207 # Console Devices
    208 
    209 # ISA console
    210 pc0	at isa? port 0x60 irq 1		# pccons generic PC console driver
    211 
    212 #pcppi0	at isa?
    213 #sysbeep0	at pcppi?
    214 
    215 
    216 # Serial Devices
    217 
    218 # PCI serial interfaces
    219 #com*	at puc? port ?			# 16x50s on "universal" comm boards
    220 #cy*	at pci? dev ? function ?	# Cyclades Cyclom-Y serial boards
    221 
    222 # ISA Plug-and-Play serial interfaces
    223 #com*	at isapnp?			# Modems and serial boards
    224 
    225 # PCMCIA serial interfaces
    226 #com*	at pcmcia? function ?		# Modems and serial cards
    227 
    228 # ISA serial interfaces
    229 #options 	COM_HAYESP		# adds Hayes ESP serial board support
    230 #com0	at isa? port 0x3f8 irq 4	# Standard PC serial ports
    231 #com1	at isa? port 0x2f8 irq 3
    232 #com2	at isa? port 0x3e8 irq 5
    233 #com3	at isa? port 0x2e8 irq 9
    234 #ast0	at isa? port 0x1a0 irq 5	# AST 4-port serial cards
    235 #com*	at ast? slave ?
    236 #boca0	at isa? port 0x100 irq 5	# BOCA 8-port serial cards
    237 #com*	at boca? slave ?
    238 #rtfps0	at isa? port 0x1230 irq 10	# RT 4-port serial cards
    239 #com*	at rtfps? slave ?
    240 #cy0	at isa? iomem 0xd4000 irq 12	# Cyclades serial cards
    241 
    242 
    243 # Parallel Printer Interfaces
    244 
    245 # PCI parallel printer interfaces
    246 #lpt*	at puc? port ?			# || ports on "universal" comm boards
    247 
    248 # ISA parallel printer interfaces
    249 #lpt0	at isa? port 0x378 irq 7	# standard PC parallel ports
    250 #lpt1	at isa? port 0x278
    251 #lpt2	at isa? port 0x3bc
    252 
    253 # I2O devices
    254 #iop*	at pci? dev ? function ?	# I/O processor
    255 #iopsp*	at iop? tid ?			# SCSI/FC-AL ports
    256 #ld*	at iop? tid ?			# block devices
    257 #dpti*	at iop? tid 0			# DPT/Adaptec control interface
    258 
    259 # SCSI Controllers and Devices
    260 
    261 # PCI SCSI controllers
    262 #ahc*	at pci? dev ? function ?	# Adaptec [23]94x, aic78x0 SCSI
    263 #bha*	at pci? dev ? function ?	# BusLogic 9xx SCSI
    264 #dpt*	at pci? dev ? function ?	# DPT SmartCache/SmartRAID
    265 #isp*	at pci? dev ? function ?	# Qlogic ISP [12]0x0 SCSI/FibreChannel
    266 #mly*	at pci? dev ? function ?	# Mylex AcceleRAID and eXtremeRAID
    267 #siop*	at pci? dev ? function ?	# NCR 53c8xx SCSI
    268 
    269 # EISA SCSI controllers
    270 #ahb*	at eisa? slot ?			# Adaptec 174[02] SCSI
    271 #ahc*	at eisa? slot ?			# Adaptec 274x, aic7770 SCSI
    272 #bha*	at eisa? slot ?			# BusLogic 7xx SCSI
    273 #dpt*	at eisa? slot ?			# DPT SmartCache/SmartRAID
    274 #uha*	at eisa? slot ?			# UltraStor 24f SCSI
    275 
    276 # PCMCIA SCSI controllers
    277 #aic*	at pcmcia? function ?		# Adaptec APA-1460 SCSI
    278 
    279 # ISA Plug-and-Play SCSI controllers
    280 #aic*	at isapnp?			# Adaptec AHA-1520B
    281 
    282 # ISA SCSI controllers
    283 #aha0	at isa? port 0x330 irq ? drq ?	# Adaptec 154[02] SCSI
    284 #aha1	at isa? port 0x334 irq ? drq ?
    285 #ahc0	at isa? port ? irq ?		# Adaptec 284x SCSI
    286 #aic0	at isa? port 0x340 irq 11	# Adaptec 152[02] SCSI
    287 #bha0	at isa? port 0x330 irq ? drq ?	# BusLogic [457]4X SCSI
    288 #bha1	at isa? port 0x334 irq ? drq ?
    289 # The "nca" and "dpt" probes might give false hits or hang your machine.
    290 #dpt0	at isa? port 0x170 irq ? drq ?	# DPT SmartCache/SmartRAID
    291 #nca0	at isa? port 0x360 irq 15	# Port-mapped NCR 53C80 controller
    292 #nca1	at isa? iomem 0xd8000 irq 5	# Memory-mapped controller (T128, etc.)
    293 #sea0	at isa? iomem 0xc8000 irq 5	# Seagate/Future Domain SCSI
    294 #uha0	at isa? port 0x330 irq ? drq ?	# UltraStor [13]4f SCSI
    295 #uha1	at isa? port 0x340 irq ? drq ?
    296 #wds0	at isa? port 0x350 irq 15 drq 6	# WD7000 and TMC-7000 controllers
    297 #wds1	at isa? port 0x358 irq 11 drq 5
    298 
    299 # SCSI bus support
    300 #scsibus* at aha?
    301 #scsibus* at ahb?
    302 #scsibus* at ahc?
    303 #scsibus* at aic?
    304 #scsibus* at bha?
    305 #scsibus* at dpt?
    306 #scsibus* at iopsp?
    307 #scsibus* at isp?
    308 #scsibus* at nca?
    309 #scsibus* at sea?
    310 #scsibus* at mly?
    311 #scsibus* at siop?
    312 #scsibus* at uha?
    313 #scsibus* at wds?
    314 
    315 # SCSI devices
    316 #sd*	at scsibus? target ? lun ?	# SCSI disk drives
    317 #st*	at scsibus? target ? lun ?	# SCSI tape drives
    318 #cd*	at scsibus? target ? lun ?	# SCSI CD-ROM drives
    319 #ch*	at scsibus? target ? lun ?	# SCSI autochangers
    320 #ss*	at scsibus? target ? lun ?	# SCSI scanners
    321 #uk*	at scsibus? target ? lun ?	# SCSI unknown
    322 
    323 
    324 # RAID controllers and devices
    325 #cac*	at eisa? slot ?			# Compaq EISA array controllers
    326 #cac*	at pci? dev ? function ?	# Compaq PCI array controllers
    327 #mlx*	at pci? dev ? function ?	# Mylex DAC960 & DEC SWXCR family
    328 #mlx*	at eisa? slot ?			# Mylex DAC960 & DEC SWXCR family
    329 #twe*	at pci? dev ? function ?	# 3ware Escalade RAID controllers
    330 
    331 #ld*	at cac? unit ?			# logical disk devices
    332 #ld*	at twe? unit ?
    333 #ld*	at mlx? unit ?
    334 
    335 
    336 # IDE and related devices
    337 
    338 # PCMCIA IDE controllers
    339 wdc* 	at pcmcia? function ?
    340 
    341 # ST506, ESDI, and ISA IDE controllers
    342 # Use flags 0x01 if you want to try to use 32bits data I/O (the driver will
    343 # fall back to 16bits I/O if 32bits I/O are not functional).
    344 # Some controllers pass the initial 32bit test, but will fail later.
    345 wdc0	at isa? port 0x1f0 irq 14 flags 0x00
    346 wdc1	at isa? port 0x170 irq 15 flags 0x00
    347 
    348 # IDE drives
    349 wd*	at wdc? drive ?			# the drives themselves
    350 
    351 # ATAPI bus support
    352 atapibus* at wdc?
    353 
    354 # ATAPI devices
    355 cd*	at atapibus? drive ?		# ATAPI CD-ROM drives
    356 #sd*	at atapibus? drive ?		# ATAPI disk drives
    357 
    358 
    359 # Miscellaneous mass storage devices
    360 
    361 # ISA floppy
    362 fdc0	at isa? port 0x3f0 irq 6 drq 2	# standard PC floppy controllers
    363 #fdc1	at isa? port 0x370 irq ? drq ?
    364 fd*	at fdc? drive ?			# the drives themselves
    365 # some machines need you to do this instead of fd*
    366 #fd0	at fdc0 drive 0
    367 
    368 # ISA CD-ROM devices
    369 #mcd0	at isa? port 0x300 irq 10	# Mitsumi CD-ROM drives
    370 
    371 # ISA tape devices
    372 # note: the wt driver conflicts unpleasantly with ed devices at the
    373 # same I/O address. The probe reprograms their EEPROMs. Don't
    374 # uncomment it unless you are actually using it.
    375 #wt0	at isa? port 0x308 irq 5 drq 1	# Archive and Wangtek QIC tape drives
    376 
    377 
    378 # Network Interfaces
    379 
    380 # PCI network interfaces
    381 #de*	at pci? dev ? function ?	# DEC 21x4x-based Ethernet
    382 #en*	at pci? dev ? function ?	# ENI/Adaptec ATM
    383 #ep*	at pci? dev ? function ?	# 3Com 3c59x/3c90x Ethernet
    384 #fpa*	at pci? dev ? function ?	# DEC DEFPA FDDI
    385 #fxp*	at pci? dev ? function ?	# Intel EtherExpress PRO 10+/100B
    386 #le*	at pci? dev ? function ?	# PCnet-PCI Ethernet
    387 #ne*	at pci? dev ? function ?	# NE2000-compatible Ethernet
    388 #tl*	at pci? dev ? function ?	# ThunderLAN-based Ethernet
    389 
    390 # EISA network interfaces
    391 #ep*	at eisa? slot ?			# 3Com 3c579 Ethernet
    392 #fea*	at eisa? slot ?			# DEC DEFEA FDDI
    393 
    394 # ISA Plug-and-Play network interfaces
    395 #ep*	at isapnp?			# 3Com 3c509 Ethernet
    396 #ne*	at isapnp?			# NE2000-compatible Ethernet
    397 
    398 # PCMCIA network interfaces
    399 ep*	at pcmcia? function ?		# 3Com 3c589 and 3c562 Ethernet
    400 mbe*	at pcmcia? function ?		# MB8696x based Ethernet
    401 ne*	at pcmcia? function ?		# NE2000-compatible Ethernet
    402 sm*	at pcmcia? function ?		# Megahertz Ethernet
    403 
    404 # ISA network interfaces
    405 ate0	at isa? port 0x2a0 irq ?		# AT1700
    406 ec0	at isa? port 0x250 iomem 0xd8000 irq 9	# 3Com 3c503 Ethernet
    407 eg0	at isa? port 0x280 irq 9		# 3C505 ethernet cards
    408 el0	at isa? port 0x300 irq 9		# 3C501 ethernet cards
    409 ep0	at isa? port ? irq ?			# 3C509 ethernet cards
    410 ef0	at isa? port 0x360 iomem 0xd0000 irq 7	# 3C507
    411 ai0	at isa? port 0x360 iomem 0xd0000 irq 7	# StarLAN
    412 fmv0	at isa? port 0x2a0 irq ?		# FMV-180 series
    413 ix0	at isa? port 0x300 irq 10		# EtherExpress/16
    414 iy0	at isa? port 0x360 irq ?		# EtherExpress PRO 10 ISA
    415 lc0	at isa? port 0x320 iomem ? irq ?	# DEC EtherWORKS III (LEMAC)
    416 #depca0	at isa? port 0x300 iomem 0xc8000 iosiz 0x8000 irq 5	# DEPCA
    417 #le*	at depca?
    418 #nele0	at isa? port 0x320 irq 9 drq 7		# NE2100
    419 #le*	at nele?
    420 #bicc0	at isa? port 0x320 irq 10 drq 7		# BICC IsoLan
    421 #le*	at bicc?
    422 ne0	at isa? port 0x280 irq 9		# NE[12]000 ethernet cards
    423 ne1	at isa? port 0x300 irq 10
    424 sm0	at isa? port 0x300 irq 10		# SMC91C9x Ethernet
    425 we0	at isa? port 0x280 iomem 0xd0000 irq 9	# WD/SMC Ethernet
    426 we1	at isa? port 0x300 iomem 0xcc000 irq 10
    427 
    428 # MII bus support
    429 #mii*	at tl?
    430 
    431 # MII PHY network interfaces
    432 #tlphy*	at mii? dev ?			# ThunderLAN PHYs
    433 #nsphy*	at mii? dev ?			# NS and compatible PHYs
    434 
    435 
    436 # Audio Devices
    437 
    438 # ISA Plug-and-Play audio devices
    439 #guspnp*	at isapnp?			# Gravis Ultra Sound PnP audio
    440 #sb*	at isapnp?			# SoundBlaster-compatible audio
    441 
    442 # ISA audio devices
    443 #gus0	at isa? port 0x220 irq 7 drq 1 drq2 6	# Gravis Ultra Sound
    444 #pas0	at isa? port 0x220 irq 7 drq 1		# ProAudio Spectrum
    445 #pss0	at isa? port 0x220 irq 7 drq 6		# Personal Sound System
    446 #sp0	at pss0 port 0x530 irq 10 drq 0		# 	sound port driver
    447 #sb0	at isa? port 0x220 irq 7 drq 1 drq2 5	# SoundBlaster
    448 #wss0	at isa? port 0x530 irq 10 drq 0	drq2 1	# Windows Sound System
    449 
    450 # Audio support
    451 #audio*	at gus?
    452 #audio*	at guspnp?
    453 #audio*	at pas?
    454 #audio*	at sb?
    455 #audio*	at sp?
    456 #audio*	at wss?
    457 
    458 # The spkr driver provides a simple tone interface to the built in speaker.
    459 #spkr0	at pcppi?		# PC speaker
    460 
    461 
    462 # Mice
    463 
    464 # ISA busmice
    465 #olms0	at isa? port 0x23c irq 5	# Logitech bus mouse
    466 #olms1	at isa? port 0x238 irq 5
    467 #omms0	at isa? port 0x23c irq 5	# Microsoft InPort mouse
    468 #omms1	at isa? port 0x238 irq 5
    469 #opms0	at pc? irq 12		# PS/2 auxiliary port mouse
    470 
    471 
    472 # Joysticks
    473 
    474 # ISA Plug-and-Play joysticks
    475 #joy*	at isapnp?			# Game ports (usually on audio cards)
    476 
    477 # ISA joysticks. Probe is a little strange; add only if you have one.
    478 #joy0	at isa? port 0x201
    479 
    480 
    481 # Miscellaneous Devices
    482 
    483 # Planetconnect Satellite receiver driver.
    484 #satlink0 at isa? port 0x300 drq 1
    485 
    486 
    487 # Pull in optional local configuration
    488 include	"arch/i386/conf/GENERIC.local"
    489 
    490 
    491 # Pseudo-Devices
    492 
    493 # disk/mass storage pseudo-devices
    494 #pseudo-device	ccd		4	# concatenated/striped disk devices
    495 pseudo-device	md		1	# memory disk device (ramdisk)
    496 #pseudo-device	vnd		4	# disk-like interface to files
    497 
    498 # network pseudo-devices
    499 #pseudo-device	bpfilter	8	# Berkeley packet filter
    500 #pseudo-device	ipfilter		# IP filter (firewall) and NAT
    501 pseudo-device	loop			# network loopback
    502 #pseudo-device	ppp		2	# Point-to-Point Protocol
    503 #pseudo-device	sl		2	# Serial Line IP
    504 #pseudo-device	strip		2	# Starmode Radio IP (Metricom)
    505 #pseudo-device	tun		2	# network tunneling over tty
    506 
    507 # miscellaneous pseudo-devices
    508 pseudo-device	pty		2	# pseudo-terminals (Sysinst needs two)
    509 #pseudo-device	tb		1	# tablet line discipline
    510 #pseudo-device	rnd			# /dev/random and in-kernel generator
    511 #options 	RND_COM			# use "com" randomness as well (BROKEN)
    512